Clutch.



G. STINEBRING.

CLUTCH.

APPLIOATION FILED JULY 22, 1012.

Patented Aug'. 18, 1914.

GEORGE STINEBRING, 0F WOOSTER, OHIO.

CLUTCH.

Specification of Letters Patent.

Patented Aug. 18, 19114.

Application led July 22, 1912. Serial No. 711,003.

To all whom t may concern Be it known that I, GEORGE STINEBRING, acitizen of the United States, residing at Wooster, in the county ofl/Vayne and State of (lhio, have invented a new and useful Clutch, ofwhich the following is a specifica tion.

My invention relates to improvements in clutches, especially'such as areused in connection with pulleys mounted loosely on a shaft. Its objectis to provide an improved clutch, operable by hand, with or without theuse of an intermediate lever, simpler and more powerful and requiringless room for its actuation than clutches of its class heretoforeconstructed; second, to provide improved means for its adjustmentautomatically within the pulley rim whereby at all parts of itsperiphery the clutch rim will exert equal pressure, and accommodateitself to the wear of the contacting parts; third, to provide means forapplying force on op posite sides of the pulley sha'l't simultaneouslyto actuate the clutch, and fourth, to provide improved means foractuating the clutch and adjusting the spread of the splitring to theinner surface of the pulley rim andfor locking the same at any desiredpressure.

It consists primarily of a split ring adjustably secured to a hub withina pulley rim and at a slight distance therefrom at all points of itsperiphery, said hub being sol idly secured to a shaft adjacent to saidpulley, which is loosely mounted on said shaft, and adjustably connectedto said split ring at a point 180 from where it is cut apart, inthemanner hereinafter set forth.

It further Yconsists of the novel means I use for spreading the splitring comprising a pair of cam levers loosely mounted on a threaded boltbetween opposite abutments, said levers operating `on opposite sides ofsaid pulley shaft, and adjustable between said abutments by means oflock-nuts on said bolt between said cam-levers, all as hereinafter' moreparticularly described and claimed. p

My invention is illustrated by the accompanying drawings in whichsimilar letters and figures of reference indicate like parts.

Referring thereto, Figure l is a cross section View of my invention online 1--1 of Fig. 2. F ig. 2 is a side view of the same on line X-Y ofFig. 1. Fig. 3 shows one of my cam-levers' detached. Fig. l is a detailview of a part of the split ring. Fig. 5 is a view of my threaded bolt.Fig. (5 shows a part of the hub projection detached, and Fig. 7 is aniodilication of my hub connection with the split ring.

In the drawings, A is the rim of a pulley.

l) is a sleeve which is slidably mounted on said shaft, and also adaptedto rotate therewith by operative engagement of the pair of coupling barsQ 2 hereafter described. It has an enlarged portion D adjacent thepulley for this purpose and for other purposes hereafter stated.

E is the hub of my improved clutch. It is solidly secured to the shaft Cwithin the loose pulley rim A by a set screw 21 or other means, as shownin Fig. 2. Said hub has a radial projection 3 at one side which extendsto a point a short distance inside of the split-ring B where it looselyengages a like j u'ojection d extending inwardly from the split ring I3.Said projections stop short of each other to accommodate the expansionof said split-ring when the split apart ends thereof are actuated ashereafter-set forth, and the radial projection 3 terminates with a tenonlike end having an oblong hole or slot, as shown in Fig. (3, adapted toreceive the holt 5 which enters snugly the projection vl transversely,as shown in Fig. 2, said projection being adapted to receive said tenonend of said radial projection 3 so as to move freely therein in a radialdirection but not otherwise.

I-leretofore means have been used which permit the expansion of thesplit ring into contact .with the inner surface of the pulley rim at apoint opposite the split, and such I do not broadly claim. My inventionin this respect is limited to the novel means shown, comjirising the tworadial arms 3 and 4 eX- tending from the ring and hub respectively andconnected in `a manner to permit their adjustment radially, only. Iaccomplish this by connecting the said projections 3 and 4 in such amanner as to permit the free action of both in a radial. directionwithout any looseness in any other direction, and preferably byv meansof the separation of the parts, and the slot is cut in a radialdirection as shown. At a point exactly opposite said radial connectionthe split-ring B is cut apart, at 10, and near each end thereof is anenlargement 11, 12, integral therewith. The adjacent ends ofsaidenlargements are each constructed kwith a cam` face tliereomfas shown inFig. l, and perforated with a longitudinal bore 13, fitted to pivotallyreceive the end of the threaded bolt H, (Fig. 5) said bolt being fittedto rotate in said perforations at each end, S, 9, the middle portionthereof being threaded at7 to receive the lock nuts I. said bolt H thelever arms 1 1 are respectively mounted, the enlarged heads thereofbeing provided with cam faces adapted to register with like cam faces onsaid enlargements 11 12 respectively asshown in Fig. 1, and said camfaces are held in juxtaposition against each other respectively by meansof said lock-nuts I on said threaded bolt H, and also by the same meansthe pressure of said cams upon each other, and the amount of spread,required to clutch the pulley rim may be easily adjusted to any desiredtension and there locked by the mutual action of said cam faces uponeach other, when operated by the cam levers 1 1 as hereafter stated.Said cam faces upon the heads of the lever arms 1 1 and upon theenlargements 11 12 are similar to each other, and each of said facesterminate with a flat portion so that when said heads are rotated abouta quarter revolution upon said enlargements respectively said fiatportions lie opposite and upon each other thereby constituting deadpoints which serve to hold said lever arms from returning automaticallyto a disengaged position. Said lever arms extend inwardly on oppositesides of the shaft C, and their free ends are linked to said sleeveenlargement D by coupling bars Q 2 on opposite sides thereof, pivotallyattached thereto as shown in Fig. 2. The sleeve D is actuatedlongitudinally upon the shaft C by means of the hand wheel F looselymounted on the sleeve and secured in position by the collar G. Othermeans may be used to actuate said sleeve in either directionlongitudinally` if desired.

The operation of the parts is as follows: Said cam-levers 1 1 beingpivotally mounted on said bolt H as aforesaid, and their adjustment tothe desired tension being fixed by said lock-nuts l on said threadedpart 7 as shown in Fig. 1, said bolt will freely rotate in said oppositeabutments, as well as within the heads of said levers. The movement ofsaid sleeve D along the shaft C in a direction away from the pulley ashort distance will simultaneously actuate both of said cam levers 1 1upon the axis of said bolt H, and therebv rotate their respective camfaces upon and over the cam faces of said abutments 11 12, to the deadpoints thereof; and, at the same time the pressure of the spread apartends of the split ring B against the inner surface of the pulley rim Awill force the opposite side of the split ring, by the free movement ofthe said radial members 3 and 4- because of said extensible At pointsnear the ends o-f connection and the slot S, snugly against said rimsurface, and thereby the entire peripheries of both split ring andpulley rim will be uniformly engaged, and, by properly adjusting the nutlocks l the clutch may be locked at any desired tension as aforesaid.

on opposite sides of the pulley shaft, and

adjustable between abutments by means of a threaded bolt having its endsfitted to rotate therein respectively, and said pair of levers, havingcani faces, mounted to pivot on said bolt between said abutments, and apair of lock nuts on the middle and threaded part of said bolt betweensaid cams to adjustably secure the saine against cam faces on saidabutments at any desired tension, and improved means for accomplishingthe free play of the split ring either toward or away from the pulleyrim in all radial directions, whereby the entire surface of the splitring is brought into innnediate contact with every part of the undersurface of the pulley rim, and like pressure exerted at all pointssimultaneously and there locked, or such pressure relaxed at pleasure.Said cam levers operate in all respects alike on opposite sides of thepulley shaft and thereby assist in keeping the pulley at a balance, givemore room for the leverage required, and act eqn-.ably and powerfully inactuating the clutch, and the adjusting means aforesaid are more simpleand inexpensive than heretofore, and the capacity of the clutch, by theaforesaid uniform and universal preosure adjustment, is greatlyenlarged.

Having thus fully described my invention, what l claim as new and desireto secure by Letters Patent is-- 1. In a clutch, the combination withashaft, a hollow loose pulley mountedthereon, a hub secured to said shaftwithin said pulley independently thereof, an arm eX- tending from saidhub in a radial direction within said pulley, an expansible split ringencircling said hub within said pulley, and means for adjustablyconnecting said ring to said hub arm at a point opposite the split ofsaid ring, of a pair of abutments within said ring adjacent to saidsplit, cam faces on said abutments respectively, set opposite each otherthereon, and a longitudinal bore through said abutments, a threadedlbolt rotatable upon its opposite ends in the bore of said abutmentsrespectively, a pair of lever arms having cam faced `enlargementspivotally mounted opposite each other on said threaded bolt adjacentsaid abutinents rel spectively, each cam face terminating with a flatportion and adapted to register with a like cam face of its adjacentabutment, a pair of lock nuts on said threaded bolt operable betweensaid enlargements, and means for actuating said pair of lever arms onoppositsJ sides of said hub simultaneously, substantially as set forth.

` 2. In a clutch, the combination with a shaft, a loose pulley thereon,a hub secured to said shaft within the rim of said pulley independentlythereof, a split ring encircling said hub within said pulley rim, andmeans for adjustably connecting said ring to said hub, of a pair ofopposite abutments on said split rim having cam faces respectively, abolt threaded intermediately its ends and rotatively mounted in andbetween said abutments, a pair of lever arms having cam facedenlargements respectively pivotally mounted on said bolt to coperatewith the cams on said abutments, and means for actuating said lever`arms on opposite sides of said hub, substantially as set forth.

3. In a clutch, the combination with a shaft, a loose pulley mountedthereon, a hub extended within the rim of said pulley and secured tosaid shaft independently of said pulley, a radial arm projecting fromsaid hub within said pulley rim, a split ring encircling said hub withinsaid pulley rim, an arm projecting inwardly from said ring opposite thesplit thereof, means for adjustably connecting said radial armslongitudinally, a pair of opposite abutments within said ring adjacentto said split having cam faces respectively, terminating with a flatsurface, a bolt threaded intermediately its ends and rotatively mountedin and between said abutments, a pair of lever arms pivoted on said boltbetween said abutments having cam faces to coperate therewith a pair oflock nuts operable on said bolt between said levers to adjustably securethe cam faces thereon against the cam faces of said opposite abutments,respectively, and means, including a sleeve movable on said shaft, toactuate said cam levers on opposite sides thereof, simultaneously,substantially as set forth.

4f. In a clutch of the class described, comprising a split ringadjustably mounted on a hub within a loose pulley rim, the combinationwith a pair of opposite abutments on said split ring, having cam faces,of a bolt threaded intermediate its ends rotatably mounted in andbetween said abutments, a pair of levers having cam faces adjacent saidabutments respectively to coperate with the cam faces thereon, saidlevers pivotally mounted on said bolt between said abutments, and meansfor actuating said levers on opposite sides of said hub simultaneously,substantially as set forth, and for the purpose specified.

In witness whereof, I hereunto set my hand this 8 day of June, 1912.

GEORGE STINEBRING.

In presence of two witnesses:

FRANK TAGGART, HIRAM B. SWARTZ.

Uopiol of this patent may be obtained for iive cents each, by addressingthe Commissioner ot Patents, Washington, D. C.

